单词：pressure gradient electron gun
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用Mp3背六级单词
ARI SHAPIRO, HOST: Many teachers across the country are calling on their state pension funds to sell their stakes in gun manufacturers. The teachers say they don't want their retirement money invested in these companies. But many people, including th
2018年NPR美国国家公共电台2月
In the square outside the British Library in London is a sculpture of Sir Isaac Newton - The first man who asked why apples seem always to fall towards the centre of the earth. Maybe they chose it for the spot because it shows a great scientist at wo
英文杂志-Magazine
This is Scientific American's 60-Second Science. I'm Sophie Bushwick. Got a minute? The shortest distance between two points may be a straight line, but try telling that to electrons: when current flows down a wire, these particles zig and zag, movin
Scientific American(九)月
【句子对照】 Hey, don't jump the gun. Listen to what he has to say before you make a decision. 嗨，不要操之过急，在做决定之前听听他怎么说。 【关键俚语】 jump the gun 英：To act too soon, before the proper time; to act on an impulse, without thinking
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Three Scientists Win Nobel Prize in Chemistry Three scientists have won the Nobel Prize for chemistry for their work to simplify and improve the imaging of biomolecules. 三位科学家因为在简化和改善生物分子成像方面的成就获得了诺
2017年VOA慢速英语(十)月
今天我们要给大家讲解的两个习惯用语都是以
美国习惯用语
我们曾经讲过几个和gun也就是枪炮的
美国习惯用语
Top Gun Bottom line 每个人的生活道路几乎都是崎岖不平，有上有下的。当然，一般人都喜欢攀登到社会的高峰，而不愿意沦落到社会的最低层。美国的俗语和
美国习惯用语
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闭着眼睛飘单词 四级词汇
But this still doesn't explain why light is able to pass through glass rather than being absorbed as with most solids. 但是这还是不能解释为什么光可以穿透玻璃而不是像其他大多固体那样被吸收。 For that, we need to go a
TED演讲教育篇
When you think you've seen everything that could possibly be done with nail art, manicure devotees prove you wrong. Step forward the new trend blowing up on Instagram for 'bubble' nails, where acrylic is piled up on top of the nail and thinned out to
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我们今天要讲的习惯用语有一个共同的词: top。大家一定早知道这个词。它解释顶端。一般说来高高在上的总比压在底层的来得优越。这正反映在我们先学的两个习惯用语里: top gun. Gun是枪。
美国习惯用语
饶舌:Hollywood Undead - Bottle and a gun 相关介绍 ：Hip-Hop,Metal,Emo,电子,混合一起是什么感觉?就是他们,Hip-hop为主,金属为辅,screamo偶来捧场.创造出了这只杰出的乐队.这是他们发行的第一张专辑. 歌词
节奏布鲁斯
Neutrons and protons occupy the atom's nucleus. The nucleus of an atom is tinyonly one millionth of a billionth of the full volume of the atombut fantastically dense, since it contains virtually all the atom's mass. As Cropper has put it, if an atom
万物简史
The Microscopic Technique Each advance in microscopic technique has provided scientists with new perspectives on the function of living organisms and the nature of matter itself. The invention of the visible light microscope late in the sixteenth cen
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